tricky job?
What I am seeing is that my wheel will track straight until I do a tight turn on some undulations; and then the steering wheel will be off center by 5-15* for awhile. I'm not sure what causes it to correct other than doing some sharp turns.
I am also getting a popping noise during some odd turns, and have a bit of play in the wheel. Steering rack and bushings have 50k on them so I don't think I've got an issue there.
If you replaced the rack, this is child's play compared to that.